Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1207167
| From | "H. Peter Anvin" <hpa@zytor.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v5 2/4] x86/ldt: Make modify_ldt synchronous |
| Date | 2015-08-13 23:10 +0200 |
| Message-ID | <pX7V8-6Ei-9@gated-at.bofh.it> (permalink) |
| References | <pR5CG-86P-19@gated-at.bofh.it> <pR5Mn-8i5-11@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 07/27/2015 10:29 PM, Andy Lutomirski wrote: > modify_ldt has questionable locking and does not synchronize > threads. Improve it: redesign the locking and synchronize all > threads' LDTs using an IPI on all modifications. > > This will dramatically slow down modify_ldt in multithreaded > programs, but there shouldn't be any multithreaded programs that > care about modify_ldt's performance in the first place. > <nitpick> ... except 32-bit programs compiled with one specific version of glibc. Do we care? I don't think so. </nitpick> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Back to linux.kernel | Previous | Next | Find similar | Unroll thread
Re: [PATCH v5 2/4] x86/ldt: Make modify_ldt synchronous "H. Peter Anvin" <hpa@zytor.com> - 2015-08-13 23:10 +0200
csiph-web